mirror of https://github.com/tc39/test262.git
45 lines
1.1 KiB
JavaScript
45 lines
1.1 KiB
JavaScript
// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-arguments-exotic-objects-defineownproperty-p-desc
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description: >
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Index gets unmapped when redefined with accessor. Unmapped index is created.
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info: |
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[[DefineOwnProperty]] ( P, Desc )
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[...]
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6. Let allowed be ? OrdinaryDefineOwnProperty(args, P, newArgDesc).
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7. If allowed is false, return false.
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8. If isMapped is true, then
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a. If IsAccessorDescriptor(Desc) is true, then
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i. Call map.[[Delete]](P).
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[...]
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9. Return true.
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flags: [noStrict]
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---*/
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(function(a) {
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let setCalls = 0;
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Object.defineProperty(arguments, "0", {
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set(_v) { setCalls += 1; },
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enumerable: true,
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configurable: true,
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});
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arguments[0] = "foo";
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assert.sameValue(setCalls, 1);
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assert.sameValue(a, 0);
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assert.sameValue(arguments[0], undefined);
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Object.defineProperty(arguments, "1", {
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get: () => "bar",
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enumerable: true,
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configurable: true,
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});
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assert.sameValue(arguments[1], "bar");
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})(0);
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